Oiling device for cutting-tools.



a. NELSON. OILING DEVICE FOR CUTTING TOOLS.

APPLICATION FILED MAB. 4, 1912.

1,087,456. Patented Feb. 17, 1914.

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' Gum/nap COLUMBIA PMNOGRAPH 50.. WASHINGTON u L CARL ERIK NELSON, 0F SEATTLE, WASHINGTON.

OILIN G DEVICE FOR CUTTING-TOOLS.

Specification of Letters Patent.

Patented Feb.17, 1914.

Application filed March 4, 1912. Serial No. 681,664.

To all whom it may concern Be it known that I, CARL E. NELSON, a citizen of the United States of America, and a resident of 7732 Nineteenth avenue northwest, Seattle, county of King, and State of Washington, have invented certain new and useful Improvements in Oiling Devices for Cutting-Tools, of which the following is a specification.

My invention is particularly adapted for applying a lubricating fluid to the blade of a saw, and has for its primary object the provision of a construction of this character in which the lubricant is forcibly expelled from the supply source for application to the cutting blade.

Other objects will be set forth as my de scription progresses and those features of construct-ion, arrangements and combinations of parts on which I desire protection, succinctly defined in my annexed claims.

Referring to the accompanying drawing, wherein like numerals of reference indicate like parts throughout: Figure 1 is a fragmentary elevation of a hand saw equipped with my invention, the removable end wall or cap of the oil chamber being removed, and some of the parts being broken away. Fig. 2 is a horizontal section taken on line 22 of Fig. 1. Fig. 3 is a fragmentary detail of the oil chamber and valve, the latter being in open position. Fig. 4 is a fragmentary view of the device in partial section, illustrating a slightly modified construction, and Fig. 5 is a detail of the filling conduit closure.

Referring -to the drawing by numerals of reference, 1 indicates a supply chamber for the oil, the same being fitted in a suitable opening of handle 2 and conveniently provided with two discharge jets 3 extending through the forward side of said handle for delivery of oil to respective side faces of the cutting blade, as 4, of the tool.

Reference numeral 5 indicates a plunger slidably mounted in a seat 6, leading from and conveniently comprising a tubular extension of chamber 1, and having its outer end provided with a button 7 projecting into slot 8 of handle 2.

Reference numeral 5 indicates a packing member secured on the inner end of plunger 5 by a disk 9, having a threaded stem 10 engaged in said plunger. Packlng member 5 is of greater diameter than seat 6 and is normally held in engagement with the inner end thereof, by a lever 11, pivotally mounted on a stud 14, as shown in Fig. 1, to thereby prevent leakage of the lubricating fluid.

Reference numeral 12 indicates a valve for ets 3, the same conveniently having a facing 12 of leather or other suitable material, and

being connected to the lower end portion of lever 11 and yieldingly held in engagement with the wall of chamber 1, by a resilient arm 13, c0nveniently consisting of one end portion of a coil spring 13, employedby me for operating lever 11 to retract plunger 5 simultaneously with the closing of said valve. Spring 13 is mounted on stud 14 and has its other end portion secured to the wall of chamber 1. Chamber 1 is conveniently provided with a removable head 15 whereby access can be readily had to the interior thereof, the said head having threaded engagement with St-Lldll: which latter is fixed to the opposite side wall or head of the chamber. In the construction shown in Figs. 1, 2 andS, to fill chamber 1, head 15 must first be removed. Valve 12 is elongated so as to project well beyond jets 3 and consequently plunger 5 must be advanced for a portion of its travel before the uncovering of said jets will be effected. This through displacement or compressing of the contents of chamber 1, a portion of the oil will be forced through the jets. When valve 12 is fully opened, it lies sufficiently beyond the jets to permit of initial retractile movement of plunger 5 prior to closing said jets, and therefore enable air being drawn into the chamber through said jets. At least this is what I believe occurs, although it is quite possible that air also enters chamber 1 through seat 6, when the latter is not sealed by packing member 5, as plunger 5 has a comparatively loose or free fit therein. Whatever may be the correct explanation, the oil spurts from jets 3 when plunger 5 is advanced quickly, this being true until practically all of the oil has been discharged from the chamber.

In Fig. 4 I have shown a filling channel or conduit 16 extending through handle 2 into communication with chamber 1, and having its outerend portion enlarged and provided with a closure 17, which closure is formed with a vent 18 normally closed by an in wardly opening valve 19 which is held by a comparatively weak spring 20.

Having thus described my invention what I claim as new, and desire to secure by Lettersfatent of the United States of America, 1S1

1. In combination with a cutting tool, a lubricant chamber in the handle thereof provided With a delivery jet extending into )roXimity to the blade of the tool, a lever 'ulcrumed in said chamber, a valve for the jet of said chamber slidably engaged with the Wall of the latter, resilient means for yieldingly holding said lever in normal position, said resilient means being engaged With said lever and having an extension projecting therefrom and carrying said valve, and a plunger for effecting the ejection of the lubricant from said chamber engaged with said lever.

2. In combination with a cutting tool, a

lubricant chamber in the handle thereof provided With a delivery jet extending into proximity to the blade of the tool, a valve for the jet of said chamber, a plunger for forcibly ejecting the lubricant from said chamber through the jet thereof, means connecting said valve with said plunger for operation thereby, said lubricant chamber being provided with a vent permitting of the intake of air during the return stroke of said plunger, and a valve for the vent of said chamber.

Signed at Vancouver B. C. this 23rd day of February 1912.

CARL ERIK NELSON. Witnesses D. IV. F. MCDONALD, W. H. PELTON.

Copies of this patent may be obtained for five cents each, by addressing the Commiseioner of Peteute, Washington, D. G. 

